Title:
【考案の名称】穴掘り機
Document Type and Number:
Japanese Patent JP2536402
Kind Code:
Y2
Inventors:
Yutaka Kaneko
Application Number:
JP40300290U
Publication Date:
May 21, 1997
Filing Date:
December 10, 1990
Export Citation:
Assignee:
Mining Industry Co., Ltd.
International Classes:
E02F3/06; E21B3/02; E21B7/02; (IPC1-7): E21B7/02; E02F3/06; E21B3/02
Domestic Patent References:
| JP54131704U |
Attorney, Agent or Firm:
Masami Hattori (2 outside)